An alternative spelling of diffuser; a device that spreads something like light or sound over a wider area.
From Latin diffusus (past participle of diffundere) + -or (Latin agent suffix). This variant spelling reflects Latin-based terminology, occasionally used in technical contexts as an alternative to the -er ending.
The -or versus -er spelling variation shows how English sometimes preserves Latin forms in technical jargon—'diffusor' and 'diffuser' mean the same thing, but diffusor sounds more technical and formal.
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